Parametric Analysis on the Vibration Characteristics of Sandwich composites Structure (original) (raw)

Syntactic foam sandwich composites are potential materials for aerospace and marine applications because of their high specific properties and better energy absorption characteristics. In the present work, syntactic foam is prepared by uniform mixing of dry fly ash cenosphere (solid waste material) and phenolic resin in equal proportions. The effect of stiffening the syntactic foam core by resin impregnated paper honeycomb (RIPH) structure on vibration characteristics of sandwich composite panels are experimentally investigated under freely suspended configuration. Uni-axial Accelerometer, 4 Chanel real time analyzer and impulse hammer are used to analyze vibration signals using half-power bandwidth method. The results reveals that, frequency and damping ratio of sandwich composites panels are significantly influenced by the cell size of resin impregnated paper honeycomb structure infused in syntactic foam core. The effects of cell size on the core density of sandwich panels and its influence vibration response are also discussed.